Radiodetector



March 17, 1925. 1,530,452

c. E. WILLEY RADIODETECTOR Filed Aug. 2 1922 fication.

Patented Mar. 17, 1925.

L UNITE STATES e TENT oFFI-cE.

oHAnLEs E. WILLEY, or LOUISVILLE, KENTUCKY.

. .nanronnrnoron.

Application filed August 23, 192 2. Seriat No. 584,614.

To all whom it may concern:

Be it known that I, CHARLES E. lVILLEY, a citizen of the United States,residingat Louisville, in the county of Jefferson and State of Kentucky,have inventedv certain new and useful Improvementsin Radio detectors, ofwhich the following is a speciimprove generally upon'the details of con-.struction of such. apparatus, my nvention.

;-.,; consists in .the combinationa-nd arrange-j ment of parts ashereinafter described and claimed, and shown in the accompanyingdrawing, forming part of this specification, and in which:

Fig. 1 is a .plan View of my improved de ,tector. stand, the differentpositions ofthe parts being indicated by dotted lines;

Fig. 2 is a side elevation thereof; and

Fig. 3 is a vertical section on an enlarged scale, substantially 011 theline 3-3 of Fig.1. Referring to the drawingsin detail,-my improveddetector stand comprises a suitable base 1, on which are mounted theusual binding posts 2 and 3, which are connected with the detectorelements in any suitable way. i H Set into the base is a screw 5 securedby a nut 6, preferablyreceived in a recess in the bottom of the base. Atits'other' end, the screw. 5 is provided with a relatively largecylindrical head i resting on the upper surface of the base, as clearlyshown inFig. 3, and-thus constituting a boss or projection. Adapted tofit over this boss 1 is a cylindrical container or holder 7, preferablyformed of a short section of metal tubing. The up per end of thiscontainer or holder is closed by a plug 8 of soft fusible metal, whichis preferably cast in the container so as to completely fill the samefor a distance of approximately half its length, as shown in Fig. 3, andin this plug 8 of fusible metal is embedded the crystal .9, which may beof indicated at 10. -the lower end of the holder o'r container? is base1, with its head the underside thereof, asshown in Fig.13, and 1ssecuredin positionby means of a length, as shown. 1

gtive thereto. I .mounted a knurledthumbl'jnut 16 or th any suitablecharacter. The crystal, ."of

course, projects above the upper surface of the fusible metal, and theupper edge of the-container? is preferably beveled off, as It will beunderstood that adapted to be removably mounted ,on the boss 1 with asnug fit, this boss serving to retain the holder in position on the baseand also constituting the electrical terminal ,whic-his connected tot-hebinding post 3, as

indicated in'Fig. l. 3' -A, second'screw ll'passes up. through thereceived; in a recess on lock nut' ,13. ;The f shank ;12 of the screwextends a considerable distanceabove the lock nut. and .-is screw;threaded [throughout Engaging this screw threaded shank 151* stud is ahollow .nut or bearing member '14,

and extending transversely through the upbearingmembenis a. shaft 15.This shaft,isilooselyjmounted in the bearingflmember 14 so asto becapable per end of thisjnut or of free; rotary and slidingmovement',,rela- .On one end ofthe sh'aft15 is like, by meansofwhichtheshaftmay, be

adjusted, and to the other'fend of theshaft sf secured, asby means .of apin 18, one end 0 free end of'this cat whisker'is preferably a] contactwire or cat whisker17. The

formed into a short spiral 19, for the sake of resilience, and ispositioned so as to-en gage the upper surface of the-crystal 9.

, It will be seen that the contact Wire 17 extends generally in adirection at substantial right anglesto the shaft 15, and thus free endof the cat Whisker may be raised or lowered, as indicated in dottedlines in Fig.- 2. By sliding the shaft 15 through its bearing in the nut14, the position of the cat whisker orcontactlwire transversely of thebase. may be varied, and by swinging the shaft 1n a horizontal plane, asindicated in dotted lines in Fig. 1, it may be angularly by rotatingthisshaft on its own axis, the

the most effective cooperation with the crystal 9.

i In order to yieldingly hold the parts against accidental displacement,so that tli' adjustment of the contact Wire may be accuratelynmintainedyl proyi'de a sijrin g" 20: As shown this is a short helicalspring of 10 tlie whip-lessen type is encliis efd" Witlilii theliollb'iyv nut 14; \ti'th' one e ndbariiig Inst the'e nd of th esitud'lg' and-the otli'ei'if en Heari g" aaiiistTtheQside of the shift13; It will b elseehi that the. pfes me of: this sbfiiig f notonly fri ctiohl 'llydid tlsthe' shaft it s'elfa 'st accidental; displacement? blitalso pro es sufiicieiit" friction be'ti' eeri j the net 14; and thre'addstiid' 12' td hold nleia t'e' i against aiig'u'lzir di's'jjlacein'e'ntreflatije" to the st'iidZ-- Thus; a' single spring serves to maintainall three adjustments. ii-saver, completely rotatingthe niit 1 4 ohthethreaded sum 1b, "the resser-e exerted By said spfiiig insbeii'zi'cre'ased of; diminished 2 is d'esi're'di Thirsty-eras sirhpleekpediefit, means are 15rd id'ed' for, adjusting the db? gre'e of trio101ml resistances which the 515mm p'iodiice's', and this adjiisting" is?compli shed by. the se ne h itiliv pei' llillTSf theftnrninglo r sii i'xeling'o the 'de'tect ot: s1lai sman1eSadie. k

1min thiis 'he se'e'n' tlizit'I haveipr'oi ride'd sin eiic'e tjiohallyi"simplel'ahd, at the seine time; effective c'brismi'cti'oir,fidettbi star-rd, .Where'by' all desired adj iist ii'eiitfsj mayb'eiquicltly' time. and se ies-messy retained;

and it isthoii'gliti that the many a di iiritag s of my, notedf'c'ons'tinction will bei fea'dily aiipiie'ciatedl without fni the'rdiscussion.-

l vhat I claini' isz' v 1'. A detec'tor' stan'd emprisi'rigl a rig-idbearing member} a shaft mounted for free rota'iy find slidirif Inov'einei itjnsa'id, en-'1- bf, contact walecarried by's'aicl sl1aft, anda separate coniiiressfon s ring. independent of, said member en-mg"against. the side" of Sean sine: w frictio'riallyhdld the oflib'tlislidihg an rotaryladjnstnient were: 111;. a men; wire earjrid bysziid shaft, and pyi ndependent of but located Within said hdlloiifmember; and 9 bearing" against t I e or Said shun to' fii'ctionallyretain the" in ad-jnsted position.

3? Adetect'dr stand cdiiipi'isi a? hollow liearihg inelhber, a stiid onW'hicl said memher is swiveled, a shaft extending through saidIHGIIlbQI"-' in a direction transverse to the axis thereof, and capableof both slidifig mu rotary adjustment therein, a contact Wire carried bysaid shaft, and a spring eiidlbd' Within said hollow member and bearingat one end on said stud andat the other endagainst said shaft; where y"the Sign sliaft isf'f cti'oiiallyfh'eld against accidental; displa'Inent'ih all directibnsi 4. A dete oibr'st'and comprising a h'ollij'xt'bearing-member," a stiidori ixi hich' sai'd nie'nijber is sfi'iteld; a:shaft; extending throimh sad-m"- lieni diiec'tiontriiifiveisetbfthe axisthereof, and capable of both sliding and i'otaryfiadjns'tfiienftherein,a contact \iire c ar'riedby said sllztft'; a" spiin '1 eiiblosed Withinsaid holl'oiv member and sailing at aga'inst" said shaft; whereby the"said Shaft is" fi'ictiohiilly. agairis't accidental dis placement in alldirections,- and means for adjiist'ing" the" pressure exerted by"v saidspen v I 5. A dlite'ctor stand comprising a fixed"; screw threadedstud,a lineei'fga ing. said stu d',' a ext-ending transverse-1 t'hfioiighsaid nnt anilfc'apa leo't bothrotary and sliditilgj "djdstnie'ntfltflere-"11 1; a Contact car'- ried byisaiwshaffl, ands spring within saidnmfini'rpqsed Haws-ends isndtorsaid screw tfhreaded 'st'ddia'rid saidshait, whereby 'bo'tli tlle" shaft and nut 'aie"h'ictio'nal1y' held? inadjusted position. v v A 6. In aadetect or" stfaild,"tlie combination\tith' rn'eirislfifladjii'stabiy siippoitifi'g a catwhislaer; of adrystal holdeitcoihpifising a cylindrical container; at plii'g'ildfs'oft nie'tal permanent mounte in andfilling. o e e'ind of fil c'oht'aihei; and 9:; crystal embedded? in said sen; metal; the otheri endof saidcylinarmaments-"111's?" free and open, and coiist itiitingflaasket.

7. In a esteem stand, the combination with means-fee adji'istibl'ysupporting a catwhisker, of a crystal holder comprising" acylindrical"container; open at both ends; a plligj of 'metal haunted inand filling one end of thecontainen; is crystal embedded int said" graftI'net'al; fi'gted bos's over" tv'li'iclif the" other ehd' of saidcontainer removab'ly' fits;

In testimony \i hi'eof I my signatu're.

CHARMS Wis-mt.-

